Home / 30,938.37-42,672.90-28,394.33

Finding the Fourth Proportional to 30,938.37, 42,672.90 and 28,394.33

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Solution

The fourth proportional to 30,938.37, 42,672.90 and 28,394.33 is: 39,163.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,938.37 : 42,672.90 = 28,394.33 : x
  2. Step 2: Convert to fraction form
    30,938.37/42,672.90 = 28,394.33/x
  3. Step 3: Cross multiply
    30,938.37x = 42,672.90 × 28,394.33
  4. Step 4: Simplify right side
    30,938.37x = 1,211,668,191.29
  5. Step 5: Solve for x
    x = 1,211,668,191.29/30,938.37
  6. Step 6: Final answer
    x = 39,163.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.